How to avoid genetically modified foods

With the rise of genetically modified organisms (GMOs)—particularly soy, corn, and tomatoes—here’s how to know what you’re really getting in the produce aisle: Start by looking at the PLU code. GMO fruit PLU codes have five numbers, starting with the number 8, whereas organically grown fruit PLUs have five numbers beginning with 9, and non-GMO, conventionally grown fruit PLUs have only four numbers.